SQLite

# 2008 December 30
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this file is testing the multi-index OR clause optimizer.
#
# $Id: where9.test,v 1.2 2008/12/30 16:35:53 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

ifcapable !or_opt {
  finish_test
  return

    INSERT INTO t2 SELECT * FROM t1;
    CREATE INDEX t2b ON t2(b,c);
    CREATE INDEX t2c ON t2(c,e);
    CREATE INDEX t2d ON t2(d,g);
    CREATE INDEX t2e ON t2(e,f,g);
    CREATE INDEX t2f ON t2(f,b,d,c);
    CREATE INDEX t2g ON t2(g,f);
    CREATE TABLE t3(x,y);
    INSERT INTO t3 VALUES(1,80);
    INSERT INTO t3 VALUES(2,80);
  }
} {}

do_test where9-1.2.1 {
  count_steps {
    SELECT a FROM t1
     WHERE b IS NULL

  count_steps {
    SELECT coalesce(t2.a,9999)
      FROM t1 LEFT JOIN t2 ON (t1.c+1=t2.c AND t1.d=t2.d) OR (t1.f||'x')=t2.f
     WHERE t1.a=80
    ORDER BY 1
  }
} {9999 scan 0 sort 1}
do_test where9-2.5 {
  count_steps {
    SELECT t1.a, coalesce(t2.a,9999)
      FROM t1 LEFT JOIN t2 ON (t1.c=t2.c AND t1.d=t2.d) OR (t1.f)=t2.f
     WHERE t1.a=80 OR t1.b=880 OR (t1.c=27027 AND round(t1.d)==80)
    ORDER BY 1
  }
} {80 2 80 28 80 54 80 80 scan 0 sort 0}
do_test where9-2.6 {
  count_steps {
    SELECT t1.a, coalesce(t2.a,9999)
      FROM t1 LEFT JOIN t2 ON (t1.c+1=t2.c AND t1.d=t2.d) OR (t1.f||'x')=t2.f
     WHERE t1.a=80 OR t1.b=880 OR (t1.c=27027 AND round(t1.d)==80)
    ORDER BY 1
  }
} {80 9999 scan 0 sort 0}
do_test where9-2.7 {
  count_steps {
    SELECT t3.x, t1.a, coalesce(t2.a,9999)
      FROM t3 JOIN
           t1 LEFT JOIN t2 ON (t1.c+1=t2.c AND t1.d=t2.d) OR (t1.f||'x')=t2.f
     WHERE t1.a=t3.y OR t1.b=t3.y*11 OR (t1.c=27027 AND round(t1.d)==80)
    ORDER BY 1, 2
  }
} {1 80 9999 2 80 9999 scan 1 sort 1}
do_test where9-2.8 {
  count_steps {
    SELECT t3.x, t1.a, coalesce(t2.a,9999)
      FROM t3 JOIN
           t1 LEFT JOIN t2 ON (t1.c=t2.c AND t1.d=t2.d) OR (t1.f)=t2.f
     WHERE t1.a=t3.y OR t1.b=t3.y*11 OR (t1.c=27027 AND round(t1.d)==80)
    ORDER BY 1, 2
  }
} {1 80 2 1 80 28 1 80 54 1 80 80 2 80 2 2 80 28 2 80 54 2 80 80 scan 1 sort 1}


ifcapable explain {
  do_test where9-3.1 {
    set r [db eval {
      EXPLAIN QUERY PLAN
      SELECT t2.a FROM t1, t2